I’m normally one to defend some of the “interpretations” of this song - but this isn’t one of them!
Biggest problem - it was just too slow - and that hurt her vocal delivery.
As for the bad singing...the only out I can give her is possible technical problems. If you can’t hear yourself well - you push too hard and overcompensate - often results in off key-ness.
As a middle aged woman...I liked it!!